Bulletin M-4

General Description:

Ordering Instructions:

* Machine Type Transformer

* Order by model number shown

* Stacked Core

* Add "X" to model number if transformer is to be fully potted

* Frame Cross Sections:

for V & VA frames 13 3/8" X 20 3/4"

for U & UA frames 16 1/2" X 20 3/4"

KVA Rating

Secondary

No. of

Tap Switch

RWMA

Model No.

Weight

Dwg.

Frame

Turns Ratio 440 V

110 C Rise

Voltage

Taps

Location

Pad Size

440V/60 Hz

Approx.

No.

Letter

Tap 1

Tap 2

Tap 3

Tap 4

Tap 5

Tap 6

Tap 7

Tap 8

250

7.6 to 13.8

8

End Mount

3

M446250V1BOL

975

R1286

V

58:1

53:1

49:1

45:1

41:1

38:1

35:1

32:1

Volts

300

8.6 to 15.7

8

End Mount

3

M446300VA1BOL

1085

R1286

VA

51:1

47:1

43:1

39:1

36:1

33:1

30:1

28:1

Volts

300

8.6 to 15.7

8

End Mount

4

M446300VA1BPL

1100

R1286

VA

51:1

47:1

43:1

39:1

36:1

33:1

30:1

28:1

Volts

400

8.8 to 16.9

8

End Mount

4

M446400U1BPL

1465

R1285

U

50:1

46:1

42:1

38:1

34:1

31:1

28:1

26:1

Volts

500

9.8 to 18.3

8

End Mount

4

M446500UA1BPL

1545

R1285

UA

45:1

41:1

37:1

34:1

31:1

28:1

26:1

24:1

Volts

Standard Features:

Optional Features:

* Class "F" insulation

* Voltages and frequencies other than shown available on request

* Stud connections for primary wiring

* Thermostats

* Secondary pad sizes and hole spacings to RWMA

* Special secondary pad sizes available on request

standard

* Remote tap switch

* Secondary end positively sealed against

contimination